Oil Pump: Service and Repair

Removing and installing oil pump

Preliminary work

1. Remove oil pan.

Information

Component overview





Note:
^ The oil pump must not be disassembled and reassembled!
^ When carrying out work on the oil circuit, it must be ensured that no dirt gets into the engine!

Note: The oil pump can be replaced while installed.








Removing oil pump





1. Unscrew chain tensioner of timing chain.





2. Unscrew the 4 fastening screws M6 x 25 of the oil suction pipe on the lower section of the crankcase.





3. Unscrew oil return line from the oil pump.





4. Remove the oil pump timing chain cover. To do this, unscrew the 2 fastening screws M5 x 25.





5. Release the 3 fastening screws M8 x 50.





6. Tilt the oil pump forwards.





7. Push the tensioning rail for the oil pump drive aside with a finger. At the same time, raise the oil pump slightly and tilt forwards.
8. Take the oil pump drive chain off the oil pump sprocket and remove the oil pump.
9. Unscrew the oil suction snorkel from the oil pump.

Installing oil pump

Note: In order to make it easier to install the oil suction pumps in the Cayenne Turbo (M48/50), it should be ensured that the driving slits on the chain sprocket are as horizontal as possible.





1. Position the oil pump slanting forwards on the lower section of the crankcase. At the same time, put the drive chain over the chain sprocket.





2. Tighten the 3 fastening screws. Tightening torque: 17 ft-lb.





ATTENTION Risk of damage!
^ The tensioning rail can become wedged in!
^ Ensure that the drive chain is tense!

3. Check that the tensioning rail is in the correct position. To do this, use a finger to push the tensioning rail away slightly from the chain. When doing this, the tensioning rail must be under pressure and holding the chain under tension.





4. Mount the plastic cover of the chain sprocket. Tighten the two fastening screws. Tightening torque: 4.2 ft-lb.





5. Secure the oil return line. Tighten fastening screw. Tightening torque: 7.5 ft-lb.





6. Attach the four fastening screws for the oil suction tube to the lower part of the crankshaft housing. Tightening torque: 9.5 ft-lb.





7. Fit tensioner for the timing chain.

Subsequent work

1. Check that the timing chain has not jumped over. To do this, turn the engine by two turns at the crankshaft. Make sure you can turn the engine without any mechanical resistance. Otherwise, set the timing.
2. Reinsert the cleaned oil pan.